About Phoebe Phoebe is a VC-funded startup transforming how engineering teams improve the reliability of complex systems. Founded by ex-Google, Meta, Amazon, and Stripe engineers, we're building AI agents that detect, diagnose and fix software problems to reduce errors and downtime. The Challenge Building intuitive interfaces for AI agents is one of the most exciting unsolved problems in tech today. As our second frontend hire, you'll pioneer new patterns for human-AI collaboration, bridging design vision and technical implementation to create interfaces that make complex AI reasoning transparent, trustworthy, and delightful. What You'll Do Pioneer AI-first user experiences: Design and build groundbreaking interfaces that translate AI power into user trust. You'll craft conversation flows, live incident dashboards, and visual debugging tools that demystify AI reasoning—visualizing causal chains, surfacing uncertainty, and making complex system states beautiful and understandable. Build high-performance frontend infrastructure: Advance our frontend architecture, building a robust, scalable component library using React, TypeScript, and modern state management. Implement real-time data streaming and optimise for sub-100ms interactions. Drive design systems: Own our design language and component library, ensuring visual consistency while maintaining development velocity. You'll make design decisions autonomously, from micro-interactions to full-page layouts. Shape product direction: Work directly with founders and early customers to rapidly prototype and iterate on features. Your insights will directly influence our roadmap and go-to-market strategy. Scale the team: As we grow, you'll help recruit, mentor, and lead the next wave of frontend engineers, establishing best practices and building a world-class engineering culture. Who You Are An AI-native engineer: You're already using AI as an essential part of your workflow. You've discovered creative ways to leverage AI for rapid prototyping, debugging complex issues, or exploring architectural decisions. You see AI tools as force multipliers, not crutches. A pragmatic craftsperson: You balance strong JavaScript/TS coding skills and a deep understanding of CSS with expertise in crafting maintainable application architecture. You write clean, scalable code but know when to be practical to meet business goals. A design-conscious builder: You have a keen eye for visual design, typography, and spacing. Whether self-taught or formally trained, you can create polished interfaces without waiting for mockups. You're comfortable with Figma for quick explorations but prefer to design in code. A curious and adaptable technologist: You balance technical conviction with openness to new ideas. Guided by solid engineering principles rather than hype, you embrace worthwhile advancements in the JavaScript ecosystem. An empathetic communicator: You embody both technical leadership and a learner's mindset, communicating complex ideas with patience while readily seeking feedback. A product-minded owner: Driven by user impact, you think critically about the "why" behind features and contribute to product decisions that deliver real value. A collaborative builder: You thrive in a small, cross-functional team. As our second frontend hire, you're excited by the opportunity to have a significant voice and shape the future of Phoebe's product. Note This is an ambitious role—we're looking for exceptional talent in key areas rather than checking every box. If you excel in several of these areas and are excited to grow in others, we'd love to hear from you. Nice to Have Experience building observability, monitoring, or DevOps tools Background with AI/LLM-powered products or conversational interfaces Contributions to open source projects or technical writing Experience with visualisation of time-series data or system topologies Early-stage startup experience (Series A or earlier) Portfolio demonstrating strong visual design work Experience with design tools (Figma, Framer) for rapid prototyping Background in human-computer interaction or UX research Ready to Define the Future of Human-AI Collaboration? This is your chance to work on genuinely hard problems at the intersection of AI and UX. If you're excited about building interfaces that don't exist anywhere else yet, let's talk. Why Phoebe Impact: Join as an early employee with direct influence on product and company direction Compensation: Competitive salary and compelling equity as an early employee Culture: Remote or hybrid for those near our London office (2-3 days/week), quarterly European off-sites Building in the open: All employees are owners and company builders—you'll receive investor memos and updates, with full transparency into our strategy and metrics AI experimentation budget: Dedicated personal budget for AI tooling to stay at the cutting edge Home office setup: Generous allowance to create your ideal work environment Learning culture: Team that prioritises knowledge sharing through regular tech talks, pair programming, and conference attendance